214 JOWETT AND MUFF : GLACIATION OF BRADFORD, ETC. 
for the Keighley Fleece Mills Co. revealed 38 feet of sand and 
gravel (probably some river gravel) resting on boulder-clay which 
was 32 feet thick. The rock floor is thus at a depth of 70 feet 
beneath the surface at this point.* Thick bluish boulder-clay 
weathering to a yellow colour at the surface is exposed at the 
junction of the Great Northern and Midland lines near Ingrow, 
and it is also seen in the cuttings of the former line as far as 
the tunnel east of Haworth. It was also exposed in the cuttings 
between Haworth and Oakworth Stations on the Midland line. 
Most of the boulders are of Millstone Grit, the proportion of 
boulders of limestone being less than that usually found in 
the drift to the north-west. Above Oakworth the boulder-clay 
becomes thin, and it is generally weathered completely through. 
In the large sandstone quarry on Denby Hill, sandy yellow 
boulder-clay four feet thick contains boulders of grit, limestone, 
and chert. At Hare Hill, one mile to the west along the Colne 
Road, a rather flat-toj^ped mound of gravel lies on the side of 
the hill at an elevation of 1,125 feet above O.D. The section 
in the pit shows three to seven feet of rudely stratified gravel 
resting on eight feet of current-bedded sand, with loamy and 
gravelly layers. The pebbles in the gravel are chiefly of grit, 
but there are a few of gannister and " blues tone." The latter 
is a local rock cropping out a little higher up the hill. A small 
pit on the south side of the Ponden Reservoir exposes a few 
feet of sand and fine gravel dipping northwards down the slope 
of the hill. In addition to pebbles of grit, there were noted 
pebbles of limestone, chert, and Silurian grit. 
Yellowish boulder-clay with limestone occurs in Ponden 
Clough at an altitude of 950 feet. At Two Laws Bridge, half 
a mile east of the county boundary, a little gravel with chert 
is seen by the roadside at an elevation of 975 feet. There is 
very little drift on Haworth Moor, a few rounded pebbles in 
the soil being all that is seen. Just off the southern edge of 
the moor near Higher Marsh some boulder-clay with rounded 
stones was exposed in a roadside section. Boulder-clay may 
be traced up Bridgehouse Beck to Oxenhope, becoming more 
*W. Whitaker, B.A., F.R.S., "Some Yorkshire Well Sections." 
Proc. Yorks. Geol. and Polyt. Soc, vol. xiii., p. 196. 
